EP0995336A1 - Method and apparatus for formatting the digital audio signal for use of the sound reproduction - Google Patents

Method and apparatus for formatting the digital audio signal for use of the sound reproduction

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Publication number
EP0995336A1
EP0995336A1 EP98935101A EP98935101A EP0995336A1 EP 0995336 A1 EP0995336 A1 EP 0995336A1 EP 98935101 A EP98935101 A EP 98935101A EP 98935101 A EP98935101 A EP 98935101A EP 0995336 A1 EP0995336 A1 EP 0995336A1
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EP
European Patent Office
Prior art keywords
signal
digital
original
copies
samplers
Prior art date
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Granted
Application number
EP98935101A
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German (de)
French (fr)
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EP0995336B1 (en
Inventor
Pierre Piccaluga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charbonneaux Marc
Perrichon Claude Annie
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Charbonneaux Marc
Perrichon Claude Annie
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Publication of EP0995336A1 publication Critical patent/EP0995336A1/en
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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G11B2020/10546—Audio or video recording specifically adapted for audio data

Definitions

  • the principle of supplying electro-acoustic transducers by analog type amplifiers is the most used.
  • the analog displacement of the membrane follows sinusoids, curves taken during recording.
  • the usable condition of the electrical audio signal is the signal, collected by the microphone (s), or coming directly from digital samplers, which is smoothed for analog use.
  • the digital sound original signal used has an intensity and a frequency of 44,100 samples per second, according to a well-known representative model (Fig.l).
  • the process is the original signal copied, and reproduced, to obtain a new digital signal for electrical control of electro-acoustic transducers. Indeed, the impulse response of the electroacoustic transducers does not conform to the signals emitted by the digital principle.
  • the present method is an interface software, containing the correction of a particular programmed compensation command adapted for an electro-acoustic transducer.
  • a time period is represented on the horizontal, where the values (EC) are present, signals are copied and the time period does not change.
  • the first reproduced copy has a scale ratio 1/3 of the original and a second copy has a ratio of 1/1. It is obvious that the multiple reproduction of the signals of the new sound signal corresponds to an adjustment of the frequencies of the signals, doubled, tripled, quadrupled as many times as the multiplication of the original signal. It is not a question of echo which prolongs the note, but of a method compensating for the inertias of the membranes, adapted to dynamic forces, which by mass dissociate the current voltage parameters of the instant. Smoothing of the newly formatted signal is expected to obtain an analog signal.
  • This digital or analog audio signal can be directly applied to the terminals of at least one electro-acoustic transducer.
  • This multiple reproduction of the recorded original signal may have, on the one hand, its value of different intensity and, on the other hand, a phase shift, a slip which may go as far as its total reverse phase value, relative to the original signal. .
  • This process is characterized by the reproduction, multiple of the originals (Fig.3) called "origin signal" of a given time (TP), in a new signal formatted 4 times the original frequency of which two copies are of reverse phase, and 1/2 intensity value.
  • the method can copy the original message and reproduce it according to all the variants of the combinations described and identically for each original signal, by cyclic sequence of order reproduced, in the intensity scale and phase ratio T1, T2, T3, T4 (Fig4).
  • the method has its audio signal formatting device for electro-acoustic transducer, characterized by an original digital signal repository recorded on a medium or live, copied by reproduction of the original, according to the method determining an interface software between an original digital signal, and a newly formatted digital signal for electrical control of better adapted mechanical movements.
  • New signals are at least two copies of the original signal.
  • the copies of the signals can be in phase or in total phase inversion compared to the original.
  • the intensities of each signal can be a fraction of the intensity value of the original.
  • An apparatus is produced by a person skilled in the art, as an example (FIG. 4) in a sound reproduction chain, having a radio receiver, a laser disc player (CD), and a formatting system according to the method, integrated in a digital amplifier (AN), to power the speakers (E).
  • the amplifier receives the digital message by the optical beam (FO) decodes the digital audio signal, by the decoder (D), which will establish the original signal.
  • This signal is transferred to four samplers (T1, T2, T3, T4) managed by a common clock.
  • a microprocessor (HC) fitted with a relay responsible for regular and cyclic scanning programs the activities of the four adjustable samplers in relation to the values of the decoder (D).
  • Each sampler by reproducing the original signal reproduced, uses two programming potentiometers, one for positioning the scale ratio of the intensities and the other for the phase of the intensities, between the phase synchronicity and the sliding of phase inversion compared to the original.
  • the sampler (T1) is identically adjusted as the sample from the decoder, the original signal.
  • the sampler (T2) is set to the reverse phase value of (T1), with the same intensity value.
  • the sampler (T3) is set to 1/3 intensity of T1 and in phase with (T1).
  • the sampler (T4) in phase with (T1) and 1/2 of intensity of (T1).
  • the formatted signal (F) is amplified by the amplifier (A) adjusted in power by the pontentiometer (V) determining the sensitivity of the decoder.
  • Digital audio signal formatting devices according to the present process need a frequency 4 times higher for the mid and treble, and only 3 times higher for the bass.
  • the sound reproduction system (Fig. 5) consisting of a microphone, a digital audio cassette player / recorder and a laser disc player, which are not exhaustive, are connected to the digital power amplifier with four independent outputs, 2 bass (B) and 2 satellites (S).
  • the amplifier requires decoders (RA), which establish the original signal.
  • An electronic clock in an electronic chip coordinates the order of action, programmed regular and cyclical of the fourteen samplers which determine the profile of the new sound message.
  • the channels respectively receive three coupled bass samplers (EGD, EGG) all adjusted in phase in a ratio of 1/3 down from the first compared to the second and 1/3 of the second compared to the third.
  • the signal newly formatted by the microprocessor (X) is amplified by the amplifier (AX) to power the subwoofers.
  • the four-level samplers (ESG.ESD) supply the satellites with amplifiers (AX).
  • the frequencies (ESG.ESD) are four times the speed of (RA) while those of (EGG, EGD) are three times the speed of (RA).
  • a smoothing modem is provided for analog reading, this device is not limiting, this is an example. All electronic means with passive or active semiconductor component or all forms of microprocessors, integrated circuits, or future products in the field of connectors, active electronics, can be used to make these devices.
  • the present method and apparatus adapts the digital sound signal into a digital control signal of all the electro dynamic transducers. This principle of correction is usable by the world of audio and audiovisual.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Stereophonic System (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

The invention concerns a method which consists in using digital sampling of a live sound recording or of an original sound medium, which is copied then formatted into a multiple reproduction of the original sampling. In order to observe the original time base, the multiple reproduction of copies, leads to the multiple reproduction of the sampling speed of the new digital signal. The quantization parameter can be identical to the original, or be subjected to value scaling, or be in reciprocal value. An apparatus formatting digital audio signal acquires a reference sampling from a digital decoder, then multiplies its data by adjustable independent samplers managed by a common clock. A relay programs the regular and cyclical activities of the samplers, determining a new digital sound signal. Said signal can be smoothed for analog use by fragile transducers. This formatting process adapted for acoustic transducers, can be used for recording and as audio signal software for transferring sound data.

Description

Procédé et appareil pour formater le signal audio numérique pour l'usage de la reproduction sonore Method and apparatus for formatting digital audio signal for use in sound reproduction
Le principe des alimentations des transducteurs électro-acoustiques par les amplificateurs de type analogique est le plus utilisé. En effet, le déplacement analogique de la membrane suit des sinusoïdes, courbes prélevées à l'enregistrement. La condition utilisable du signal audio électrique , est le signal, recueilli par le ou les micros, ou issu directement d'échantillonneurs numériques, qui est lissé pour l'usage analogique. Le signal d'origine numérique sonore utilisé a une intensité et une fréquence de 44 100 échantillons par seconde, suivant un modèle représentatif bien connu (Fig.l).Le procédé est le signal d'origine copié, et reproduit, pour obtenir un nouveau signal numérique pour la commande électrique des transducteurs électro-acoustiques. En effet, la réponse impulsionnelle des transducteurs électroacoustiques n'est pas conforme aux signaux émis par le principe numérique . Un effet de traînage est remarqué sur les impulsions des membranes qui ne s'arrêtent pas quand l'impulsion est finie. L'impulsion mécanique se prolonge par l'effet de la masse de la membrane pour les impulsions fortes . Les impulsions fines sont alors dans cette circonstance masquées. Il devient nécessaire de remédier à cet inconvénient par le présent procédé, en imposant au moins une information supplémentaire pour contrôler les effets mécaniques des mouvements d'emballement des membranes . Le présent procédé est un logiciel d'interface, contenant la correction de commande particulière de compensation programmée adapté pour transducteur électro-acoustique.The principle of supplying electro-acoustic transducers by analog type amplifiers is the most used. In fact, the analog displacement of the membrane follows sinusoids, curves taken during recording. The usable condition of the electrical audio signal is the signal, collected by the microphone (s), or coming directly from digital samplers, which is smoothed for analog use. The digital sound original signal used has an intensity and a frequency of 44,100 samples per second, according to a well-known representative model (Fig.l). The process is the original signal copied, and reproduced, to obtain a new digital signal for electrical control of electro-acoustic transducers. Indeed, the impulse response of the electroacoustic transducers does not conform to the signals emitted by the digital principle. A dragging effect is noticed on the impulses of the membranes which do not stop when the impulse is finished. The mechanical impulse is extended by the effect of the mass of the membrane for strong impulses. The fine pulses are then masked in this circumstance. It becomes necessary to remedy this drawback by the present process, by imposing at least additional information to control the mechanical effects of the runaway movements of the membranes. The present method is an interface software, containing the correction of a particular programmed compensation command adapted for an electro-acoustic transducer.
Deux possibilités sont retenues pour pallier aux effets d'emballement mécanique, soit une multiplication du signal audio numérique avec des valeurs plus petites mais en phase , soit des impulsions en inversion de phase. Pour cela le procédé est une utilisation des signaux numériques sonores d'origine en référence qui sont copiés et reproduits en plusieurs exemplaires, en un nouvel agencement ne modifiant pas le temps de l'original. La commande est précise , nécessaire pour vaincre les inerties mécaniques des membranes. Le paramètre temps est une constante, aussi quand les informations doublent ou triplent, la fréquence des signaux double ou triple proportionnellement à la multiplication des copies reproduites. Ces copies de signaux peuvent avoir des valeurs d'intensité différentes , par rapport à l'original et entres elles. Par exemple (Fig.2) une période de temps est représentée sur l'horizontale , où sont présentes les valeurs (EC), des signaux sont copiés et la période de temps ne change pas.La première copie reproduite a un rapport d'échelle de 1/3 de l'original et une deuxième copie a un rapport de 1/1 . Il est évident que la reproduction multiple des signaux du nouveau signal sonore , correspond à un ajustement des fréquences des signaux , doublés, triplés, quadruplés autant de fois que la multiplication du signal d'origine. Il ne s'agit pas d'écho qui prolonge la note, mais d'une méthode compensant les inerties des membranes, adaptée aux efforts dynamiques, qui par la masse dissocient les paramètres tension courant de l'instant. Un lissage du signal nouvellement formaté est prévu pour obtenir un signal analogique. Ce signal audio numérique, ou analogique peut être directement appliqué aux bornes de au moins un transducteur électro acoustique. Cette reproduction multiple du signal d'origine enregistré peut avoir d'une part sa valeur d'intensité différente et d'autre part un déphasage, un glissement pouvant aller jusqu'à sa valeur inverse totale de phase, par rapport au signal d'origine. Ce procédé est caractérisé par la reproduction, multiple des originaux (Fig.3) dit "signal d' origine" d'un temps (TP) donné, en un nouveau signal formaté de 4 fois la fréquence d'origine dont deux copies sont de phase inverse, et de 1/2 valeur d'intensité . Ces signaux en inversion de phase recalent la membrane dont l'inertie la déporterait trop loin et elle prendrait un retard pour l'impulsion suivante, ce qui crée la dissociation tension courant.Two possibilities are chosen to overcome the effects of mechanical runaway, either a multiplication of the digital audio signal with smaller values but in phase, or pulses in phase inversion. For this the process is a use of the original digital sound signals in reference which are copied and reproduced in several copies, in a new arrangement which does not modify the time of the original. The command is precise, necessary to overcome the mechanical inertias of the membranes. The time parameter is a constant, also when the information doubles or triples, the frequency of the signals doubles or triples in proportion to the multiplication of the reproduced copies. These copies of signals can have different intensity values, compared to the original and between them. For example (Fig. 2) a time period is represented on the horizontal, where the values (EC) are present, signals are copied and the time period does not change. The first reproduced copy has a scale ratio 1/3 of the original and a second copy has a ratio of 1/1. It is obvious that the multiple reproduction of the signals of the new sound signal corresponds to an adjustment of the frequencies of the signals, doubled, tripled, quadrupled as many times as the multiplication of the original signal. It is not a question of echo which prolongs the note, but of a method compensating for the inertias of the membranes, adapted to dynamic forces, which by mass dissociate the current voltage parameters of the instant. Smoothing of the newly formatted signal is expected to obtain an analog signal. This digital or analog audio signal can be directly applied to the terminals of at least one electro-acoustic transducer. This multiple reproduction of the recorded original signal may have, on the one hand, its value of different intensity and, on the other hand, a phase shift, a slip which may go as far as its total reverse phase value, relative to the original signal. . This process is characterized by the reproduction, multiple of the originals (Fig.3) called "origin signal" of a given time (TP), in a new signal formatted 4 times the original frequency of which two copies are of reverse phase, and 1/2 intensity value. These signals in phase inversion readjust the membrane whose inertia would offset it too far and it would take a delay for the next pulse, which creates the dissociation current voltage.
Le procédé peut copier le message original et le reproduire suivant toutes les variantes des combinaisons décrites et de façon identique pour chaque signal d'origine, par séquence cyclique d'ordre reproduit, dans le rapport d'échelle d'intensité et de phase T1 , T2 , T3 , T4 (Fig4 ). Le procédé a son appareil de formatage de signal audio pour transducteur électro acoustique, caractérisé par un référentiel de signal numérique d'origine enregistré sur un support ou en direct , copié par reproduction de l'original, suivant le procédé déterminant un logiciel d'interface entre un signal numérique d'origine, et un signal numérique nouvellement formaté pour une commande électrique des mouvements mécaniques mieux adaptés . Les nouveaux signaux sont au moins deux copies du signal original. Les copies des signaux peuvent être en phase ou en inversion totale de phase par rapport à l'original. Les intensités de chaque signal peuvent être d'une fraction de la valeur d'intensité de l'original.The method can copy the original message and reproduce it according to all the variants of the combinations described and identically for each original signal, by cyclic sequence of order reproduced, in the intensity scale and phase ratio T1, T2, T3, T4 (Fig4). The method has its audio signal formatting device for electro-acoustic transducer, characterized by an original digital signal repository recorded on a medium or live, copied by reproduction of the original, according to the method determining an interface software between an original digital signal, and a newly formatted digital signal for electrical control of better adapted mechanical movements. New signals are at least two copies of the original signal. The copies of the signals can be in phase or in total phase inversion compared to the original. The intensities of each signal can be a fraction of the intensity value of the original.
Un appareil est réalisé par l'homme de l'art, comme exemple (Fig.4) dans une chaîne de reproduction sonore, ayant un récepteur radio un lecteur de disque laser (CD) , et un système de formatage suivant le procédé, intégré dans un amplificateur numérique (AN), pour alimenter les enceintes acoustiques (E). L'amplificateur reçoit le message numérique par le faisceau optique (FO) décode le signal audio numérique, par le décodeur (D) , qui va établir le signal d'origine. Ce signal est transféré à quatre échantillonneurs (T1 ,T2 ,T3 ,T4) gérés par une horloge commune. Un micro processeur (HC) muni d'un relais chargé du balayage régulier et cyclique programme les activités des quatre échantillonneurs réglables par rapport aux valeurs du décodeur (D). Chaque échantillonneur, par copie de signal d'origine reproduit , utilise deux potentiomètres de programmation, l'un pour positionner le rapport d'échelle des intensités et l'autre pour la phase des intensités, entre la synchronicité de phase et le glissement d'inversion de phase par rapport à l'original. Dans ce cas l'échantillonneur (T1) est identiquement réglé comme l'échantillon du décodeur, signal d'origine. L'échantillonneur (T2) est réglé en valeur inverse de phase de (T1), avec la même valeur d'intensité . L'échantillonneur (T3) est réglé à 1/3 d'intensité de T1 et en phase avec (T1). L'échantillonneur (T4) en phase avec (T1 ) et 1/2 d'intensité de (T1). Le signal formaté (F) est amplifié par l'amplificateur (A) réglé en puissance par le pontentiomètre (V) déterminant la sensibilité du décodeur. Les appareils de formatage de signal audio numérique suivant le présent procédé ont besoin d'une fréquence 4 fois supérieure pour les médiums et aigus, et seulement de 3 fois supérieure pour les basses. Le système de reproduction sonore (Fig.5) constitué d'un micro, d'un lecteur/enregistreur de cassette audio numérique et d'un lecteur de disque laser , qui ne sont pas exhaustifs, sont reliés à l'ampli numérique de puissance à quatre sorties indépendantes, de 2 basses (B) et de 2 satellites (S) . L'amplificateur nécessite des décodeurs (RA), qui établissent le signal original. Une horloge électronique dans une puce électronique (HE) coordonne l'ordre d'action, programmé régulier et cyclique des quatorze échantillonneurs qui déterminent le profil du nouveau message sonore . Les canaux reçoivent respectivement trois échantillonneurs couplés pour les graves (EGD, EGG) réglés tous en phase dans un rapport de 1/3 en diminution du premier par rapport au deuxième et de 1/3 du deuxième par rapport au troisième. Le signal nouvellement formaté par le microprocesseur (X) est amplifié par l'amplificateur (AX) pour alimenter les caissons de basses. Les échantillonneurs (ESG.ESD) à quatre niveaux alimentent les satellites par les amplificateurs (AX). Les fréquences (ESG.ESD) sont de quatre fois la vitesse de (RA) tandis que celles de (EGG, EGD) sont de trois fois la vitesse de (RA). Un modem de lissage est prévu pour la lecture analogique, cet appareil n'est pas limitatif , c'est un exemple.Tous les moyens électroniques à composant passif ou actif de semi conducteur ou toutes les formes de micro-processeurs, circuits intégrés , ou produits à devenir dans le domaine de la connectique, électronique active, peuvent être utilisés pour réaliser ces appareils.An apparatus is produced by a person skilled in the art, as an example (FIG. 4) in a sound reproduction chain, having a radio receiver, a laser disc player (CD), and a formatting system according to the method, integrated in a digital amplifier (AN), to power the speakers (E). The amplifier receives the digital message by the optical beam (FO) decodes the digital audio signal, by the decoder (D), which will establish the original signal. This signal is transferred to four samplers (T1, T2, T3, T4) managed by a common clock. A microprocessor (HC) fitted with a relay responsible for regular and cyclic scanning programs the activities of the four adjustable samplers in relation to the values of the decoder (D). Each sampler, by reproducing the original signal reproduced, uses two programming potentiometers, one for positioning the scale ratio of the intensities and the other for the phase of the intensities, between the phase synchronicity and the sliding of phase inversion compared to the original. In this case the sampler (T1) is identically adjusted as the sample from the decoder, the original signal. The sampler (T2) is set to the reverse phase value of (T1), with the same intensity value. The sampler (T3) is set to 1/3 intensity of T1 and in phase with (T1). The sampler (T4) in phase with (T1) and 1/2 of intensity of (T1). The formatted signal (F) is amplified by the amplifier (A) adjusted in power by the pontentiometer (V) determining the sensitivity of the decoder. Digital audio signal formatting devices according to the present process need a frequency 4 times higher for the mid and treble, and only 3 times higher for the bass. The sound reproduction system (Fig. 5) consisting of a microphone, a digital audio cassette player / recorder and a laser disc player, which are not exhaustive, are connected to the digital power amplifier with four independent outputs, 2 bass (B) and 2 satellites (S). The amplifier requires decoders (RA), which establish the original signal. An electronic clock in an electronic chip (HE) coordinates the order of action, programmed regular and cyclical of the fourteen samplers which determine the profile of the new sound message. The channels respectively receive three coupled bass samplers (EGD, EGG) all adjusted in phase in a ratio of 1/3 down from the first compared to the second and 1/3 of the second compared to the third. The signal newly formatted by the microprocessor (X) is amplified by the amplifier (AX) to power the subwoofers. The four-level samplers (ESG.ESD) supply the satellites with amplifiers (AX). The frequencies (ESG.ESD) are four times the speed of (RA) while those of (EGG, EGD) are three times the speed of (RA). A smoothing modem is provided for analog reading, this device is not limiting, this is an example. All electronic means with passive or active semiconductor component or all forms of microprocessors, integrated circuits, or future products in the field of connectors, active electronics, can be used to make these devices.
Le présent procédé et appareil adapte le signal numérique sonore en un signal numérique de commande de tous les transducteurs électro dynamiques.Ce principe de correction, est utilisable par le monde de l'audio et l'audiovisuel. The present method and apparatus adapts the digital sound signal into a digital control signal of all the electro dynamic transducers. This principle of correction is usable by the world of audio and audiovisual.

Claims

REVENDICATIONS
1 °) Procédé de formatage de signal audio numérique, pour la commande de au moins un transducteur électro acoustique à partir d'un signal numérique original, de signal électrique sonore, modifié en un signal numérique sonore par copie du signal d'origine, à une fréquence plus élevée, proportionnelle aux copies, dont les exemplaires reproduits ont des valeurs d'intensités différentes de l'original afin de contrôler les effets d'emballement mécanique des o transducteurs électro-acoustiques.1 °) Method for formatting a digital audio signal, for controlling at least one electro-acoustic transducer from an original digital signal, from an electric sound signal, modified into a digital sound signal by copying the original signal, a higher frequency, proportional to the copies, the reproduced copies of which have different intensity values from the original in order to control the effects of mechanical runaway of the electro-acoustic transducers.
2°) Procédé selon la revendication (1) caractérisé par l'inversion de phase des copies, qui ont des intensités pouvant aller jusqu'à l'inversion totale de phase par rapport au signal d'origine.2 °) A method according to claim (1) characterized by the phase inversion of the copies, which have intensities up to the total phase inversion with respect to the original signal.
3°) Procédé selon la revendication (1) ou (2) où le signal numérique 5 nouvellement formaté est lissé pour l'usage en signal analogique.3 °) Method according to claim (1) or (2) wherein the newly formatted digital signal 5 is smoothed for use as an analog signal.
4°) Appareil pour formater un signal numérique de commande, directement appliqué aux bornes de au moins un transducteur électro acoustique, à partir d'un signal d'origine d'un enregistreur numérique ou d'un support numérique sonore, en un nouveau signal audio 0 numérique sonore dont les signaux d'origine sont copiés et reproduits à des fréquences plus élevées , créés par des échantillonneurs spécifiques pour chacun des signaux copiés, caractérisés en ce que les valeurs d'intensités et de phases des nouveaux signaux sont réglables, par deux potentiomètres distincts, et dont l'ordre d'action 5 des échantillonneurs (T1 ,T2,T3,T4) est cyclique et régulier.et est assuré par une horloge électronique (HE ).4) Apparatus for formatting a digital control signal, directly applied to the terminals of at least one electro-acoustic transducer, from an original signal from a digital recorder or from a digital sound medium, into a new signal audio 0 digital sound whose original signals are copied and reproduced at higher frequencies, created by specific samplers for each of the copied signals, characterized in that the values of intensities and phases of the new signals are adjustable, by two separate potentiometers, whose order of action 5 of the samplers (T1, T2, T3, T4) is cyclic and regular. and is ensured by an electronic clock (HE).
5°) Appareil selon la revendication (4) caractérisé en ce que la fréquence des échantillonneurs est proportionnelle au nombre de reproduction des copies , soit la fréquence doublée s' il y a deux 0 copies, quadruplée s' il y a quatre copies du signal d'origine.5 °) Apparatus according to claim (4) characterized in that the frequency of the samplers is proportional to the number of reproduction of the copies, ie the frequency doubled if there are two 0 copies, quadrupled if there are four copies of the signal of origin.
6°) Appareil selon les revendications (4) ou (5) caractérisé par l'adjonction d'un modem de lissage, pour une fonction analogique. 6 °) Apparatus according to claims (4) or (5) characterized by the addition of a smoothing modem, for an analog function.
EP98935101A 1997-07-07 1998-07-06 Method and apparatus for formatting the digital audio signal for use of the sound reproduction Expired - Lifetime EP0995336B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9708822A FR2765765B1 (en) 1997-07-07 1997-07-07 METHOD AND APPARATUS FOR FORMATTING THE DIGITAL AUDIO SIGNAL FOR THE USE OF SOUND REPRODUCTION
FR9708822 1997-07-07
PCT/FR1998/001437 WO1999003303A1 (en) 1997-07-07 1998-07-06 Method and apparatus for formatting the digital audio signal for use of the sound reproduction

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EP0995336A1 true EP0995336A1 (en) 2000-04-26
EP0995336B1 EP0995336B1 (en) 2001-12-19

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JP (1) JP2001510287A (en)
KR (1) KR20010021558A (en)
CN (1) CN1262856A (en)
AT (1) ATE211344T1 (en)
AU (1) AU759981B2 (en)
BR (1) BR9815508A (en)
CA (1) CA2295869A1 (en)
DE (1) DE69803074T2 (en)
DK (1) DK0995336T3 (en)
ES (1) ES2170511T3 (en)
FR (1) FR2765765B1 (en)
IL (1) IL133898A (en)
NO (1) NO20000051L (en)
PT (1) PT995336E (en)
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WO (1) WO1999003303A1 (en)

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JP4630956B2 (en) * 2004-03-30 2011-02-09 学校法人早稲田大学 Howling frequency component enhancement method and apparatus, howling detection method and apparatus, howling suppression method and apparatus, peak frequency component enhancement method and apparatus

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US4515997A (en) * 1982-09-23 1985-05-07 Stinger Jr Walter E Direct digital loudspeaker
DE3447111A1 (en) * 1984-12-22 1986-06-26 Josef Dipl.-Ing. 5060 Bergisch Gladbach Heim METHOD FOR CONVERTING DIGITALIZED SIGNALS CONTAINING SOUND INFORMATION IN SOUND WAVES AND RELATED CIRCUIT ARRANGEMENT
US4773096A (en) * 1987-07-20 1988-09-20 Kirn Larry J Digital switching power amplifier
US5347587A (en) * 1991-11-20 1994-09-13 Sharp Kabushiki Kaisha Speaker driving device
GB9506725D0 (en) * 1995-03-31 1995-05-24 Hooley Anthony Improvements in or relating to loudspeakers

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NO20000051D0 (en) 2000-01-06
WO1999003303A1 (en) 1999-01-21
FR2765765A1 (en) 1999-01-08
KR20010021558A (en) 2001-03-15
DE69803074T2 (en) 2002-08-22
PT995336E (en) 2002-06-28
IL133898A (en) 2003-01-12
DK0995336T3 (en) 2002-04-15
DE69803074D1 (en) 2002-01-31
ATE211344T1 (en) 2002-01-15
JP2001510287A (en) 2001-07-31
AU759981B2 (en) 2003-05-01
ES2170511T3 (en) 2002-08-01
CN1262856A (en) 2000-08-09
IL133898A0 (en) 2001-04-30
BR9815508A (en) 2001-11-06
RU2218674C2 (en) 2003-12-10
EP0995336B1 (en) 2001-12-19
NO20000051L (en) 2000-03-02
AU8446698A (en) 1999-02-08
FR2765765B1 (en) 2002-12-06
CA2295869A1 (en) 1999-01-21

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